| SCT | secretin; sex chromatin test; sexual compatibility test; sickle-cell trait; sperm cytotoxicity; spin... |
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| STAI | State Trait Anxiety Inventory |
| ACD | 1) Absolute Cardiac Dullness; 절대심둔탁음 2) Anemia of Chronic Disease &nbs... |
| AD | 1) Alveolar Duct 2) Autosomal Dominant 3) Auris Dextra; Ri... |
| ABPA | actin-binding protein, autosomal form; allergic bronchopulmonary aspergillosis |
| threshold trait | A trait that falls into natural groups that originate not in categorically distinct causes but in whether or not the outcome attains critical values; e.g., gallstones may result from a categorical cause or from unusual levels of causal factors that themselves show no evidence of grouping. Synonym: liminal trait. (05 Mar 2000) |
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| trait | A qualitative characteristic; a discrete attribute as contrasted with metrical character. A trait is amenable to segregation rather than quantitative analysis; it is an attribute of phenotype, not of genotype. Origin: Fr. From L. Tractus, a drawing out, extension (05 Mar 2000) |
| liminal trait | A trait that falls into natural groups that originate not in categorically distinct causes but in whether or not the outcome attains critical values; e.g., gallstones may result from a categorical cause or from unusual levels of causal factors that themselves show no evidence of grouping. Synonym: liminal trait. (05 Mar 2000) |